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Multiply by 9 and 99 Worksheet

Vedic maths trick 11: Multiply by 9, 99 and 999 · Set 619 · 40 sums
TalentJR

The trick (Ekanyunena Purvena): Write the number with as many digits as there are nines (add zeros in front if needed). Left part: the number minus 1. Right part: “all from 9 and the last from 10” of the number. More digits than the nines (237 × 99)? Split off as many digits as there are nines (2 | 37): left = number − (front part + 1) = 234, right = complement of 37 = 63 → 23463.

NameDateTime takenScore ___ / 40
  1. 1.602 × 999 =
  2. 2.8115 × 999 =
  3. 3.16 × 99 =
  4. 4.182 × 9 =
  5. 5.66 × 99 =
  6. 6.12201 × 999 =
  7. 7.56 × 99 =
  8. 8.7 × 9 =
  9. 9.47 × 99 =
  10. 10.2 × 9 =
  11. 11.8 × 9 =
  12. 12.3 × 99 =
  13. 13.8 × 9 =
  14. 14.3 × 9 =
  15. 15.648 × 999 =
  16. 16.6 × 9 =
  17. 17.12 × 9 =
  18. 18.8 × 9 =
  19. 19.741 × 999 =
  20. 20.2971 × 99 =
  21. 21.431 × 99 =
  22. 22.16 × 99 =
  23. 23.21 × 9 =
  24. 24.5 × 9 =
  25. 25.17 × 99 =
  26. 26.52 × 99 =
  27. 27.32 × 99 =
  28. 28.16 × 99 =
  29. 29.5 × 9 =
  30. 30.3 × 9 =
  31. 31.3 × 9 =
  32. 32.87 × 99 =
  33. 33.174 × 999 =
  34. 34.6 × 9 =
  35. 35.121 × 999 =
  36. 36.81 × 99 =
  37. 37.847 × 99 =
  38. 38.8 × 9 =
  39. 39.8 × 9 =
  40. 40.4 × 9 =

Answer key

  1. 601398
  2. 8106885
  3. 1584
  4. 1638
  5. 6534
  6. 12188799
  7. 5544
  8. 63
  9. 4653
  10. 18
  11. 72
  12. 297
  13. 72
  14. 27
  15. 647352
  16. 54
  17. 108
  18. 72
  19. 740259
  20. 294129
  21. 42669
  22. 1584
  23. 189
  24. 45
  25. 1683
  26. 5148
  27. 3168
  28. 1584
  29. 45
  30. 27
  31. 27
  32. 8613
  33. 173826
  34. 54
  35. 120879
  36. 8019
  37. 83853
  38. 72
  39. 72
  40. 36

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